MCP Datadog Server

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden. It mentions retrieving 'last 150 test results summaries,' which implies a read-only operation, but does not disclose behavioral traits like pagination, rate limits, authentication requirements, error handling, or the format of the summaries. This leaves significant gaps in understanding how the tool behaves.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the key information ('Get the last 150 test results summaries') without any wasted words. It is appropriately sized for a tool with no parameters and clear purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of retrieving test results (which may involve data retrieval and summarization), the description is incomplete. No annotations exist to provide safety or behavioral hints, and there is no output schema to describe return values. The description lacks details on result format, error conditions, or any constraints, making it inadequate for full understanding.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0 parameters with 100% coverage, so no parameters are documented in the schema. The description does not add parameter details, but since there are no parameters, this is acceptable. It implies a 'given Synthetic browser test' as context, but does not specify how this is provided (e.g., via path or query), leaving minor ambiguity.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Get') and resource ('last 150 test results summaries for a given Synthetic browser test'), making the purpose specific and understandable. However, it does not explicitly distinguish this tool from sibling tools like 'get_synthetics_tests_browser_results_v1' or 'get_synthetics_test_results_v1_2', which appear to be similar, so it lacks sibling differentiation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It does not mention prerequisites, such as needing a specific test ID or browser test context, nor does it compare it to sibling tools like 'get_synthetics_tests_browser' or 'get_synthetics_test_results_v1_2' for different use cases.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.